Francis d



F. D. PASTQRlUS. Stove-Pipe Damper.

Patented Aug. 11, 1868.

MPUERS PHOT APHER, WASHVNKTON. D, Q

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Letters Patent No. 80,832, dated August 11, 1868.

IMPROVEMENT IN STOVE-PIPE DAMPERS.

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TO ALL WHOM IT MAY cononnn:

Be it known that I, FRANCIS D. PASTORIUS, of the city'and county ofPhiladelphia, and State of Pennsyl- Vania, have invented a new andimproved Automatic Damper, Valve-Seat, and Gas-Escape; and I do. herebydeclare that the following is a full, clear, and exact description ofthe same, reference being had to the accompanying sheet 'of drawings,and to the letters of reference marked thereon. D

My invention consists in inserting a valve-seat and gas escape in astove-pipe, flue, or other suitable receptacle, to which is attached anautomatic valve,'which closes on the valve seat when the heat increases,and checks the fire by stopping the draught, and opens when the heatdecreases. The valve-seat and gas-escape has a'number of openings orholes, to maintain combustion and permit the gaseous products ofcombustion to escape when the damper is closed.

On reference to the accompanying sheet of drawings, making part of thisspecification Figure 1 is a plan view. i v

Figure 2 is a sectional view of the same, being a valve-seat andgas-escape formed of the frustum of abollow cone, the apex of the samebeing above the damper or valve. i

Figure 3 shows the'same'as in fig. 2, with the apex below the valve.

Figure 4 shows a valve-seat and gas-escape, when formed of the frustumof a hollow scalene cone; and

Figure 5 is a sectional view, showing the construction of the valve-seatand gas-escape, as at first proposed.

Similar letters refer to similar parts in the several views.

A is a stove-pipe, flue, or other suitable receptacle, into which isfitted a valve-seat and gas-escape, 13, formed of the frustum of ahollow cone, to which are fitted the lugs do, in which turns thebentvalve-rod C, which carries the valve D. The part a of the said rodoutside of the stove-pipe or other suitable receptacle has a screwformed on it, over which takes the nut or counterpoise E. The partstrend 6 of the rod, instead of making an anglc, meet in a curve, F, asshown in fig. 1, so that the counterpoise E can be screwed beyond theaxis of rotation or part 6 of the rod. The part a of the rod, and thevalve D, should'be in the same plane, that the attendant may be able tojudge of the degree of opening of the 'valve by the inclination of thepart a. The valve-seat and gas-escape has its surface perforated, asshown at c c c, figs. 1, 2, and 3, to maintain com bustion and permitthe gaseous products of combustion to escape when the valve D is closed.

Before starting afirc, the counterpoise E is screwed along the end, a,of the rod C, until it passes the a'uis of rotation or part 6, into thecurve F; then the valve D drops wide open by its own weight, giving aperfectly free draught. When the fire gets thoroughly kindled, theweight or countcrpoise is adjusted at a point-on the screw to balanccthe valveopen suiliciently wide to preserve a regular temperature, andkeep up aslow combus then. As the draught increases, it. closes thevalve, and when itulocreases,the'valve opens by its own weight. It isgenerally feund i-n motion,and serves to indicate plainly the force ofthe fire.

As shown in fig. 2, the apex (Z of the cone is above the valve, and infigl3 it is below it. As shown in fig. 4, the valve-scat and gas-escapeis a truncated hollow scalcne cone, that is, where the axis of rotatiouof the cone is not perpendicular to thebases When the apex isbc'low thevalve, as in fig 3, the scale or soot from the Stovepipe orothersuitable receptacle does not settle and harden on the inclined surfaceofthe Valve-seat, and obstruct the passage of; the gases of combustionthrough the openings ci c, &c. I at first contemplated making thevalve-seat and gas-escape of a flat ring fixed to the pipe or othersuitable receptacle, as shown in fig. 5. i I wish it distinctlyunderstood that I do not confine myself to the valve-seat B, as shownand described, knowing that it can be made of other forms approaching tothat of the frus-tum of a cone, andaccomplish the end sought; as, forinstance, it can be a frustum of a hollow pyramid of any number ofsides; the frnstum of a hollow oblate spheroidt the frnstum of a hollowparaboloid, or the frustdm of a hollow hyperbolic conoidl I claim avalve-seat and gas-escape fixed ina stove-pipe, flue, or other suitablereceptacle, the surface or sides of which incline and converge to-apoint at or near the centre of' the said stove-pipe or other, thepoint.. of convergence to be either above or below the valve, and thesurface or sides to be either straight or curved.

The stove-pipe, flue, or valve-receptacle, can be of forms other thancylindrical, as shown at A. It can be formed of a short cylindricallength, and be cast in one piece, along with the valve-seat. It can be ahollow globe with pipe conneetions, or a hollow frustum of a spheroidwith pipe-connections, and the valve-seat cast or otherwise-fixed in it,and still carry out the design or end of the invention, which is toconstruct an automatic valve and valve-seat or gas-escape, which willcarry off the gaseous products of combustion, maintain a slow combustionwhen the valve is closed, and at the same time not interfere with theself-acting or automatic working of the valve. If it should be foundexpedient to use the damper for the purposes of ventilation, theperforations in the valve-seat may be dispensed with. v

I do not claim to be the inventor of the automatic oi self-acting valve,being aware that Letters Patent were granted to Charles H. Lavis, June20,1865, for a damper, using a self-acting valve in combination withother parts. v

I am also aware that the. said self-acting or automatic valve fordampers for stoves, and for ventilating chambers, is an old device, andnot the subject of a patent in itself.

What I claim as my invention, and desire to secure by Letters Patent,is 1. A valve-scat and gas-escape, in combinationwith an automatic orself-acting valve, for the purpose specifial.

2. A valve-seat and gas-escape, in combination with the automatic orself-acting valve D,.and the stovepipe, flue, or other suitablereceptacle, A, as shown.

v3. A valve-seat andgas-escape, B, in combination with the rod C, valveD, and the counterpoise E, as shown. In testimony whereof, I hereuntosign my name to this specification in presence of two subscribingwitnesses.

FRANCIS D. PASTORIUS.

Witnesses:

J. P. DELANEY, CH LEs H. LAv s.

